cargo build error

[liaoxuewei]

Follow the instructions to make a simple demo trainer, but there is a compilation error. Is there any information you can provide, thanks!

E:\MyProjects\rust-app>cargo build Updating tuna index Compiling masonry v0.1.2 error[E0609]: no field app on type RefMut<'_, AppRootInner> --> C:\Users\liaoxuewei.cargo\registry\src\mirrors.tuna.tsinghua.edu.cn-df7c3c540f42cdbd\masonry-0.1.2\src\app_root.rs:217:19 | 217 | inner.app.quit(); | ^^^ unknown field

For more information about this error, try rustc --explain E0609. error: could not compile masonry due to previous error